Circuit boards including removable test point portions and configurable testing platforms

ABSTRACT

Circuit boards are provided that include a functional portion and at least one removable test point portion. The removable test point portion may include test points which are accessed to verify whether the functional portion is operating properly or whether installed electronic components are electrically coupled to the board. If multiple boards are manufactured together on a single panel (in which the individual boards are broken off), the test points can be placed on bridges (e.g., removable portions) that connect the individual boards together during manufacturing and testing. Configurable test boards are also provided that can be adjusted to accommodate circuit boards of different size and electrical testing requirements. Methods and systems for testing these circuit boards are also provided.

CROSS-REFERENCE TO RELATED APPLICATIONS

This claims the benefit of U.S. Provisional Patent Application No.60/857,336, filed Nov. 7, 2006, which is hereby incorporated byreference herein in its entirety.

BACKGROUND OF THE DISCLOSURE

This relates to circuit boards including a removable test point portionand to configurable testing platforms for testing circuit boards.

Circuit boards such as printed circuit boards (PCBs), logic boards,printed wiring boards, etched wiring boards, and other known boards maybe used to mechanically support and electronically connect electroniccomponents (e.g., integrated circuits, resistors, transistors, andcapacitors). Circuit boards are typically constructed using one or morelayers of a non-conductive substrate and signal conducting pathways. Thesignal conducting pathways may exist in one or more layers or in eachlayer of the non-conductive substrate. The signal conducting layers,sometimes referred to as traces, members, or leads, may be a metalconductive material (e.g., copper or gold) or an optical conductivematerial (e.g., fiber optics).

Electronic components may be mounted to the circuit board using athrough-hole construction or a surface-mount construction andelectronically coupled to one or more signal-conducting pathways viasoldering. When the electronic components are physically andelectrically coupled to the board, tests may be performed to check, forexample, the interconnection of signal conducting paths and electroniccomponents, proper component installation and operation, electromagneticcompliance, electrostatic discharge, and other suitable testingparameters. Such tests may be performed by applying probes to testpoints or test nodes populated throughout the circuit board.

Test points may be electrically connected to the signal conductingpathways and thus operative to provide test data to a probe connectedthereto. FIG. 1 shows a top view of a simplified block diagram of aprior art circuit board 100 including a functional portion 110 and testpoints 120 (shown as cross-hatched squares) disposed among functionalportion 110. A disadvantage of test points in conventional circuitboards, such as that shown in FIG. 1, is that they occupy valuable “realestate” on the board, thereby limiting the end-use functional efficiencyof the board that would otherwise be obtained but for the presence ofthe test nodes. That is, the test points occupy real estate that wouldbe better utilized by electronic components. As a result, test points,while necessary to perform tests, limit scaling (e.g., miniaturization)of the board and component density. Accordingly, what is needed is acircuit board that maximizes end-use functional efficiency whileproviding test points for use in performing tests.

Testing platforms for performing tests on circuit boards are known. Forexample, one known testing machine may include a computer operated probethat is moved from one test node to another. However, such testingplatforms may require sophisticated and expensive robotics to move thetest probe to specific locations on the circuit board. In addition, suchrobotics may require sophisticated control software for each circuitboard being tested. Other testing platforms, which are not as flexibleas robotic based testing platforms, include custom-made testingplatforms specifically designed to test a particular circuit board. Suchplatforms may include a top test panel and bottom test panel which eachinclude specifically arranged probes that are interfaced with testpoints on the circuit board. Drawbacks of these custom-made platformsinclude expensive manufacturing cost, limited lifespan, and inability totest more than one circuit board. Accordingly, what is needed is aversatile testing platform capable of testing many different types ofcircuit boards.

SUMMARY OF THE DISCLOSURE

A circuit board that maximizes end-use functional efficiency whileproviding test nodes for use in performing tests is provided. End-usefunctional efficiency is maximized and test nodes are provided in acircuit board constructed in accordance with the principles of thepresent invention to include a functional portion and a least oneremovable test node portion. As defined herein, the functional portionis the portion of the circuit board that may be used for an end-usepurpose (e.g., in a consumer electronic device). For example, thefunctional portion may include the electronic components (e.g.,processor, memory, battery, capacitors, etc.) necessary for the end-usepurpose. The removable test node portion includes test nodes that areelectrically coupled to signal conducting pathways in the functionalportion to permit desired testing of the functional portion at, forexample, a test site. After the desired testing is performed, theremovable portion may be removed, thereby leaving only the functionalportion for the end-use purpose.

Other circuit boards may be provided that include two or more functionalportions that share a removable test point portion. The shared removabletest point portion may serve as a bridge that may serve aninterconnecting framework for enabling a circuit board to be populatedwith several functional portions. An advantage of using shared removabletest point portions is that it may be sized to yield a circuit board fortesting by existing testing devices. For example, because the locationof test probes of a testing device is known, shared removable test pointportions may be constructed such that the test probes of the testingdevice align with the test points located on the shared portions whenthe test probes are applied.

Configurable testing platforms are provided for interfacing with andtesting circuit boards of different types and sizes, in particularcircuit boards having side mounted test points. Side mounted testpoints, as opposed to top or bottom mounted test points, exist on theedge of the board. Configurable platforms may be physically configurableto receive circuit boards of different size and electricallyconfigurable to test different types of circuit boards (e.g., circuitboards having different end-use purposes), thereby providing a“universal” testing platform.

The physical configurability may be realized using circuit boards havingside mounted test points because the location of the side mounted testpoints may not vary in the same manner as top or bottom mounted testpoint may vary. That is, for any given circuit board having side mountedtest points, many such circuit boards may be constructed to have similarstandards. Therefore, regardless of the length and width of the circuitboard, use of side mounted test points may be consistent from one boardto the next. Such consistency provides a stable foundation forconstructing a test probe array, which may interface with the sidemounted test points, regardless of board size and end-use purpose.

Electrical configuration may be accomplished using test probe signalselection circuitry. Different boards, and thus the test points of thoseboards, may require specific signals during testing. The test probearray or arrays of a configurable testing platform may be configuredunder the direction of test probe signal selection circuitry to provideeach test probe a desired signal.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features of the present invention, its nature andvarious advantages will become more apparent upon consideration of thefollowing detailed description, taken in conjunction with theaccompanying drawings, in which like reference characters refer to likeparts throughout, and in which:

FIG. 1 shows a top view of a simplified block diagram of a prior artcircuit board;

FIG. 2 shows a top view of a simplified block diagram of a circuit boardconstructed in accordance with the principles of the present invention;

FIGS. 3A-L show top views of different circuit boards according to theprinciples of the present invention;

FIG. 4 shows a side-view of a portion of a simplified block diagram of acircuit board constructed in accordance with the principles of thepresent invention;

FIG. 5 shows a circuit board arrangement in which two functionalportions share a common removable test point portion in accordance withthe principles of the present invention;

FIG. 6 shows an illustrative circuit board including several functionalportions bridged by a shared removable test point portion in accordancewith the principles of the present invention;

FIG. 7 is a flowchart showing steps that may be performed using acircuit board including at least one removable portion in accordancewith the principles of the present invention;

FIG. 8 shows a block diagram of a black-box abstraction of aconfigurable testing platform constructed according to the principles ofthe present invention;

FIG. 9 shows a blown-up partial cross-sectional view of a section of thecircuit board of FIG. 8 in accordance with the principles of the presentinvention;

FIG. 10 shows a simplified top view of a configurable testing platformin accordance with the principles of the present invention;

FIGS. 11A and 11B show simplified views of another configurable testingplatform in accordance with the principles of the present invention;

FIG. 12 shows a simplified side view of yet another configurable testingplatform according to the principles of the present invention;

FIG. 13 shows test probe signal selection circuitry that may be used toelectrically configure testing platforms in accordance with theprinciples of the present invention;

FIG. 14 shows a flowchart illustrating steps that may be taken tointerface a configurable testing platform to a circuit board inaccordance with the principles of the present invention; and

FIG. 15 shows an illustrative system 1500 that may be used in connectionwith a configurable testing platform in accordance with the principlesof the invention.

DETAILED DESCRIPTION OF THE DISCLOSURE

FIG. 2 shows a top view of a simplified block diagram of a circuit board200 constructed in accordance with the principles of the presentinvention. As shown, circuit board 200 includes functional portion 210and removable test point portion 220. Functional portion 210 may includethe electronic components (not shown), and any software that may bestored and/or processed by one or more of the components, that mayultimately be used for an end-use purpose. Signal conducting pathways(not shown in functional portion 210 though shown extending from portion210 to portion 220) may exist in one or more layers of circuit board200. Test conductors 225 (which are a type of signal conducting pathway,and thus may also exist in one or more layers of circuit board 200) mayprovide a substantially direct pathway between a test point 228 inportion 220 and one or more test sites (e.g., a component of portion 210or an interconnection between a component and circuit board 200) inportion 210. In some embodiments, test conductors 225 may be signalconducting pathways specifically placed in circuit board 200 for testingpurposes only. In other embodiments, test conductors may be signalconducting pathways that may serve multiple purposes. For example, atest conductor may serve as both a test conductor for enabling tests tobe performed and, after removable portion 220 is removed, a signalconducting pathway for transmitting signals in an end-use application.

Note that the representation of functional portion 210 and removableportion 220 in FIG. 2 is merely illustrative. As shown, removableportion 220 is attached to functional portion via test conductors 225,whereas the actual portions may not be attached. FIG. 2 shows dashedlines extending between portions 210 and 220 to illustrate, that in someembodiments, portions 210 and 220 may actually be attached to each other(e.g., portion 210 is direct physical contact with portion 220) or maybe attached to each other by an interposing medium. Actual boardconstruction (e.g., how portions 210 and 220 are attached) may be amatter of design choice and need not be limited to the examples andrepresentations discussed herein.

In circuit boards having multiple layers, test conductors 225 and othersignal conducting pathways may preferably be located in the middlelayers to maximize available real estate for electronic components onthe top, bottom or both top and bottom portions of the circuit board. Itis understood that even if test conductors and other signal conductingpathways are primarily located in the middle layers, such pathways mayalso be present in the top, bottom, or both top and bottom layers. It isfurther understood that the principles of the present invention can beapplied to any type of circuit board configuration, regardless ofwhether it is a single or multilayer layer construction.

Removable test point portion 220 may include several test points 228which may be electrically coupled to test conductors 225. As definedherein, a test point is a region where signals can be applied theretoand/or extracted therefrom, for example, by a testing platform fortesting a test subject or subjects of portion 210. Test points 228 mayreside on a top portion, a bottom portion, both top and bottom portions,a side portion, two or more side portions, or any combination thereof ofcircuit board 200. The side portion refers to an edge of a circuit board(as opposed to a top or bottom portion). A more detailed explanation oftest points residing in a side portion may be found in U.S. patentapplication Ser. No. 11/545,958, filed Oct. 10, 2006, entitled “Methodand Apparatuses for Testing Circuit Boards,” the disclosure of which ishereby incorporated by reference herein in its entirety.

In circuit board embodiments which include test points located on thetop, bottom, or both top and bottom portions, such circuit boards may beconstructed such that removable test point portion 220 includes amajority or all of the test points. Such construction advantageouslyyields a functional portion of circuit board 200 having enhanced end-usefunctional efficiency. That is, by concentrating the test points inremovable portion 200, the size of functional portion 210 may bereduced. In addition, the density of electronic components may beincreased. In other circuit board embodiments which include test pointslocated on at least one side and on the top, bottom, or both top andbottom portions, such circuit boards may be constructed such that thetest points on the top, bottom, or both top and bottom portions areconcentrated in removable portion 220. In yet other circuit boardembodiments which have only side mounted test points, such circuitboards may be constructed such that those test points are located onremovable portion 220.

It is understood that although in some embodiments it may be preferableto concentrate the location of test points on removable portion 220,other embodiments may be provided where the percentage of test points onfunctional portion 210 is the same or greater than the percentage oftest points on removable portion 220. For example, a circuit boardhaving side mounted test points on one or more sides of the functionalportion 210 may outnumber the number of test points on removable portion220 regardless of whether removable portion 220 has side, top, and/orbottom mounted test points.

FIG. 2 shows a circuit board 200 having removable portion 220 attachedto a first side of functional portion 210, though it is understood thatmany different circuit board arrangements may be practiced in accordancewith the principles of the present invention. A few examples of thesedifferent arrangements are shown in FIGS. 3A-I, each of which show a topview of different circuit boards according to the principles of thepresent invention. FIGS. 3A-D show circuit boards including a functionalportion 310 and a removable test point portion 320 located on only oneside of functional portion 310. In particular, removable test pointportion 320 is located on the right, left, bottom, and top sides offunctional portion 310 as shown in FIGS. 3A, 3B, 3C, and 3D,respectively. FIGS. 3E-I show circuit boards including removableportions 320 attached to at least two sides of functional portion 310.In particular, FIG. 3E shows two removable portions 320 attached toadjacent sides of functional portion 310. FIGS. 3F and 3G show tworemovable portions 320 attached on opposite sides (left and right inFIG. 3F and top and bottom in FIG. 3G) of functional portion 310. FIG.3H shows three removable portions 320 attached to three sides offunctional portion 310, whereas FIG. 3I shows four removable portions320 attached to four sides of functional portion 310.

FIG. 3J shows a circuit board having several removable portions 320attached to a side of functional region 310. Including severalindependently removable portions 322 with a circuit board may provideflexibility in testing and installation of the circuit board in an enduse device. For example, it may be desirable to test a portion of thecircuit board, remove the removable portion 322 including the testpoints used for testing that portion, and at least partially install(e.g., attach a device to the board) the circuit board. Then, when thecircuit board is at least partially installed, further testing may beperformed using the remaining removable portions. After testing, theremaining removable portions may be removed. The foregoing example isnot limited to the embodiment of FIG. 3J and may be practiced in anycircuit board according to the invention having at least two removableportions (e.g., FIGS. 3E-I).

FIG. 3K shows a circuit board in which a removable portion 320 can beattached to a functional portion 312 that is non-rectilinear. As shown,the circuit board has a removable portion 320 surrounding a largeportion of non-rectilinear functional portion 312. FIG. 3L shows acircuit board having a functional portion 310 completely surrounded by aremovable test point portion 322.

It is understood that the arrangements discussed in FIGS. 3A-L aremerely illustrative and that different arrangements may be practiced bythe present invention.

Circuit boards according to the invention may be constructed tofacilitate removal of a removable test point portion. Referring to FIG.4, a side-view of a portion of a simplified block diagram of a circuitboard 400 constructed in accordance with the principles of the presentinvention is shown. Circuit board 400 shows functional portion 410 andremovable portion 420 coupled together (at dashed line 402). Cleavableportions 440 and 442 may exist in the top and bottom portions of board400, respectively, to promote removal of removable portion 420. Ifdesired, additional cleavable portions (not shown) may be provided onone or more sides of circuit board 400. Cleavable portions 440 and 442may influence a breakage point between portions 410 and 420, akin to howa perforation promotes separation in paper, by intentionally making aportion of the board more susceptible to breakage than other portions ofthe board. In addition, cleavable portions 440 and 442 may also serve asa “guide channel” for a cleaving tool that may be used to separateportions 410 and 420. For example, assuming the cleaving tool punchesthrough the board to sever the portions, it may be inserted into the“guide channel” prior to punching through, thereby ensuring the punchoccurs at the right location on the board.

The removable test point portion of a circuit board according to theinvention may be removed using any number of suitable approaches. Forexample, the removable portion may be removed by cleaving (whether byapplication of a cutting object such a saw or a high energy source suchas a laser), punching, or other suitable approach.

FIG. 5 shows a circuit board arrangement in which two functionalportions share a common removable test point portion in accordance withthe principles of the present invention. As shown, a shared removabletest point portion 525 is attached to functional portions 510 and 512.Shared portion 525 may include test points (not shown) common to bothportions 510 and 512, test points (not shown) specific to either portion510 or 512, or a combination of both common and specific test points. Acommon test point may be electrically coupled to one or more of the samecomponents or signal conducting pathways in both portions 510 and 512.Common test points may enable a testing device to test two or morefunctional portions at a time, thereby reducing testing time and extramaterial cost. Specific test points may be electrically connected toonly one functional portion (e.g., portion 512).

Shared removable test point portion 525 may serve as a bridge among twoor more functional portions, and as such, may provide an interconnectingframework for enabling a circuit board to be populated with severalfunctional portions, which can be tested using removable test pointportions. FIG. 6 shows an illustrative circuit board 600 includingseveral functional portions 610 bridged by shared removable test pointportion 625 in accordance with the principles of the present invention.As shown, circuit board 600 includes an N-by-M matrix of functionalportions 610, where N represents a predetermined number of functionalportions 610 along a x-coordinate (shown as four portions) and where Mrepresents a predetermined number of functional portions along ay-coordinate (shown as three portions). Interspersed among functionalportions 610 is shared removable test point portion 625 (shown as acontiguous bridge within board 600). Shared removable test point portion625 may include common test points and/or specific test points locatedon the top, bottom, or both top and bottom sides of board 600. Alsoshown are removable test point portions 630 disposed on the outsideedges of circuit board 600. Removable test point portions 630 mayinclude specific test points located on the edge, top, bottom, or acombination thereof of board 600.

An advantage of using shared removable test point portion 625 is that itmay be sized to yield a circuit board for testing by existing testingdevices. For example, because the location of test probes of a testingdevice is known, shared removable test point portion 625 may beconstructed such that the test probes of the testing device align withthe test points located on the portion 625 when the test probes areapplied. Thus, cost savings may be realized by using a “generic” testingdevice to test different functional portions, each having differentend-use purposes.

FIG. 7 is a flowchart showing steps that may be performed using acircuit board including at least one removable portion in accordancewith the principles of the present invention. At step 710, a circuitboard including at least one functional portion and at least oneremovable test point portion is provided. For example, any one of thecircuit boards discussed above in connection with FIGS. 2-6 may beprovided. At step 720, electrical components (e.g., integrated circuits,resistors, and capacitors) may be installed on the circuit board. Theelectrical components may be installed using known techniques such assoldering, pinch crimps, snap connections, and any other known techniquefor securing an electrical connection.

Concurrently with or after the installation of electrical components,the functional portion may be tested by applying at least one test probeto at least one test point on the removable test point portion (asindicated at step 730). The testing may check a test site on functionalportion such as, for example, whether a particular electrical componentis electrically coupled to a signal conducting pathway or anotherelectrical component. Test probes may be applied to top, bottom, and/orside mounted test points.

At step 740, a removable test point portion may be removed from thecircuit board, thereby yielding the functional portion for an end-usepurpose. When the removable test point portion is removed, exposed leads(e.g., signal conducting pathway) on the functional portion may betreated to prevent corrosion. The exposed leads may be treated byapplying an epoxy, wax, or anti-oxidizing agent to the exposed leads. Atstep 750, the functional portion may be used for an end-use purpose.

It is understood that the steps illustrated in FIG. 7 are merelyillustrative and that additional steps may be added and that existingsteps may be omitted. For example, the step of treating exposed leadsmay be added.

FIG. 8 shows a block diagram of a black-box abstraction of aconfigurable testing platform constructed according to the principles ofthe present invention. Configurable testing platform 810 abstractlyrepresents one of many different testing device embodiments according tothe invention that may receive and test a circuit board 820, inparticular, a circuit board having side mounted test points (shown astest point 822). A detailed discussion of circuit boards having sidemounted test points can be found the in the above-identified patentapplication entitled “Methods and Apparatuses for Testing CircuitBoards,” however, for convenience, FIG. 9 is provided to show a blown-uppartial cross-sectional view of section A of circuit board 820,illustrating side mounted test points 822 on an edge surface of board820. Note the construction of side mounted test point 822 is consistentfrom one test point to another (e.g., in distance between test pointsand the size of each test point), showing that the construction mayconform to side mounted test point construction standard.

Referring back to FIG. 8, configurable platform 810 may be physicallyconfigurable to receive circuit boards of different size. In fact,circuit board 820 is drawn to show it may vary in size (shown as havinga varying lengthwise direction), as indicated by the gap separating theboard. It is understood that circuit board 820 may vary in size in thewidthwise and heightwise directions as well. The physicalconfigurability may be realized using circuit boards having side mountedtest points because the location of the side mounted test points may notvary in the same manner as top or bottom mounted test point may vary.That is, for any given circuit board having side mounted test points,many such circuit boards may be constructed to have similar standards.Therefore, regardless of the length and width of the circuit board, useof side mounted test points may be consistent from one board to thenext. Such consistency provides a stable foundation for constructing atest probe array, which may interface with the side mounted test points,regardless of board size and end-use purpose. Preferably, the width ofthe test probe array is at least as wide as the widest circuit board tobe tested on platform 810, thereby ensuring universal accommodation ofall desired circuit boards. In addition, at least one test probe arraymay be movable to accommodate circuit boards of different lengths, aswill be explained in greater detail in connection with the discussionaccompanying FIGS. 10-12. In some embodiments, control system 830 maycontrol movement of the at least one movable test probe array by, forexample, adjusting pneumatics or drive belts connected to the movabletest probe array. Note that one of the test probe arrays may be a memberthat holds a received circuit board in place, but is not able tointerface with test point.

In addition, configurable platform 810 may be electrically configurableto accommodate different circuit boards. Different boards, and thus thetest points of those boards, may require specific signals duringtesting. The test probe array or arrays of configurable testing platform810 may configure each test probe to provide a desired signal.Electrical configuration may be accomplished using test probe signalselection circuitry according to the principles of the present inventionand discussed in more detail below in connection with the discussionaccompanying FIG. 13. In some embodiments, the selection of signalsprovided to test probes may be performed by control system 830.

FIG. 10 shows a simplified top view of a configurable testing platform1000 in accordance with the principles of the present invention. Testingplatform 1000 includes test probe arrays 1010 and 1012, each of mayinclude several test probes 1015. Test probe arrays 1010 and 1012 arelocated on opposite sides of circuit board 1020. One or both test probearrays 1010 and 1012 may be movable. If movable, the array may becoupled to a precision controlled movement system (not shown). Forexample, a pneumatic system or a track system (e.g., linear slide) maybe used to provide precisely controlled movement of one or both testprobe arrays 1010 and 1012. In the pneumatic system, pneumatics may beattached to probe arrays 1010 and 1012 to control positioning withrespect to circuit board 1020. In the track system, probe arrays 1010and 1012 may reside on carriages that can be moved to desired locationson the track.

Testing platform 1000 may provide automated interfacing with and testingof circuit board 1020. For example, circuit board 1020 may be placed ina predetermined position in the platform 1000 and a user may indicate toa control system (not shown) the type of circuit board 1020. The controlsystem may automatically adjust one or both test probe arrays 1010 and1012 such that relevant test probes 1015 are interfaced with the testpoints (not shown) of circuit board 1020. Note that some test probes maynot interface with circuit board 1020 when test probe arrays 1010 and1012 are in the “interfacing position”. Such non-interfaced probes maynot affect the testing performed by testing platform. In fact, thecontrol system (not shown) may configure such non-interfaced probes tobe null (e.g., by coupling such nodes to ground). The interfaced probesmay be electrically configured to accommodate circuit board. When testprobe arrays 1010 and 1012 are in the interfacing position, testing maycommence.

FIG. 11A shows a simplified perspective view of another configurabletesting platform 1100 in accordance with the principles of the presentinvention. FIG. 11B shows a simplified side view of configurable testingplatform 1100 in accordance with the principles of the presentinvention. Reference will be made to both FIGS. 11A and 11B during thediscussion of testing platform 1100. Configurable testing platform 1100includes fixed test probe array 1110 and movable test probe array 1112,each of which may include test probes 1115 (shown as the concavedportions). Test probe arrays 1110 and 1112 may be electrically coupledto a control system (not shown) for electrically configuring test probes1115.

Fixed test probe array 1110 is fixed in a permanent position in platform1100, serving as an anchor for accepting circuit board 1120. Movabletest probe array 1112 is free to slide in a linear direction towards andaway from fixed test probe array 1110. When circuit board 1120 isreceived by platform 1100, a first end of board 1120 may be insertedinto test probe array 1110, movable test probe array 1112 may be movedaway from fixed test probe array 1110 to provide clearance for a secondend of board 1120 to be received by movable test probe array 1112.Movable test probe array 1112 may be coupled to a tension member 1130which is fixed to anchor member 1140. Tension member 1130 may be a coilspring or other tension inducing object or device that exerts linearpressure on movable test probe array 1112 in the direction of fixed testprobe array 1110. Tension member 1130 may be designed such thatsufficient pressure is exerted on movable test probe array 1112 toensure a secured interfacing position is obtained for circuit boards ofany desired size.

FIG. 12 shows a simplified side view of yet another configurable testingplatform 1200 according to the principles of the present invention.Configurable testing platform 1200 includes test probe arrays 1210 and1212, both of which may include test probes 1215 (as shown by theconcaved portion). Test probe arrays 1210 and 1212 may be electricallycoupled to a control system (not shown) for electrically configuringtest probes 1215. Test probe arrays 1210 and 1212 may rotate aboutaxis's 1211 and 1213, respectively. Referring specifically to array1210, array 1210 may rotate from a ninety degree angle (at which pointarray 1210 is perpendicular to platform base 1202) to a predeterminedangle less than ninety degrees. Arrays 1210 and 1212 may be tensionloaded such that they are biased to reside at the ninety degree angle.Such a bias may be desired to ensure sufficient test probe arraypressure is exerted on circuit board 1220 when in an interfacingposition.

When configurable testing platform receives circuit board 1220, testprobe arrays 1210 and 1212 may rotate away from circuit board 1220 toaccommodate circuit boards of different size. For example, board 1220itself may cause test probes arrays 1210 and 1212 to rotate away fromboard 1220 until board 1220 is secured in place by test probes 1215. Insome embodiments, the test probes 1115 may move independently of therotation of test probe arrays 1210 and 1212 to further promoteinterfacing of circuit board test points (not shown) to test probes1215. For example, as the lean angle of arrays 1210 and 1212 decreases(i.e., drops from ninety degrees to a predetermined angle), the positionof the test probes 1215 may be counter-rotated with respect to therotation of array 1210 and 1212 so that test probes 1215 are better ableto make contact to the test points. In other words, test probes 1215 maybe constructed on a independently rotating carriage which may allow therelative position of test probes 1215 (within arrays 1210 and 1212) toremain substantially the same regardless of the lean angle. As such, therelative position of test probes 1215 may be same when arrays 1210 and1212 are at a ninety degree angle as when arrays 1210 and 1212 are at aseventy degree angle.

FIG. 13 shows a test probe signal selection circuitry 1302 that may beused to electrically configure testing platforms in accordance with theprinciples of the present invention. Also shown in FIG. 13 is test probearray 1310 that has several test probes 1315. Each test probe is coupledto a test probe data line 1318. Each test probe data line 1318 may beselectively electrically coupled to any one of source data lines D₁through D_(N) by selection circuitry 1310, based on the circuit board tobe interfaced to test probe array 1310. Source data lines may includesignals of different voltage and current and other test data signals.The data for the source data lines may be supplied by and monitored bycontrol system 1330.

An advantage of selection circuitry 1310 is the ease in which a testingplatform can be electrically reconfigured for interfacing with adifferent circuit board. In digital implementations of selectioncircuitry 1310, control signals provided by control system 1330 maycause selection circuitry 1310 to selectively electrically couple theappropriate source data line to the test probe data line. Each dotrepresents a “switch” that may be selectively turned ON and OFF toelectrically couple a source data line to a particular test probe dataline. A digital implementation may include a multiplexor, a digitallycontrolled switch matrix (e.g., an FPGA) or a software emulation of suchhardware. Selection circuitry 1310 may also be implemented in a manualimplementation such as, for example, a manually controlled switch matrixwhich may require a user to physically insert and/or remove jumpers toaffect the desired electrical couplings.

FIG. 14 shows a flowchart illustrating steps that may be taken tointerface a configurable testing platform to a circuit board inaccordance with the principles of the present invention. At step 1410, aconfigurable testing platform is provided (e.g., platforms 1000, 1100,or 1200 of FIGS. 10, 11, and 12, respectively). At step 1420, anindication is received of the type of circuit board to be received bythe testing platform. For example, a user may input into a control panelor computer which circuit board is to be tested. At step 1430, thetesting platform is electrically configured based on the receivedindication. More particularly, the test probes may be “primed” fortesting a specific circuit board by selectively electrically couplingthe test probe to a particular data line using, for example, test probesignal selection circuitry 1302 of FIG. 13.

FIG. 15 shows an illustrative system 1500 that may be used in connectionwith a configurable testing platform in accordance with the principlesof the invention. System 1500 may include computer 1510, user interfaceequipment 1530, and configurable testing platform 1540. System 1500 mayinclude multiple computers 1510 and user interface equipment 1530, butonly one of each is illustrated in FIG. 15 to avoid complicating thedrawing. Computer 1510 is shown connected to user interface equipment1530, and platform 1540 via communication paths 1590.

Computer 1510 may include circuitry such as a processor 1512, database1514 (e.g., a hard-drive), memory 1516 (e.g., random-access-memory), andremovable-media drive 1518 (e.g., a floppy disk drive, a CD-ROM drive,or a DVD drive). This circuitry can be used to transmit data to, from,and/or between user interface equipment 1530 and the platform 1530.Computer 1510 may configure platform 1530 (e.g., electrically and/orphysically configure) by responding to user input (e.g., a specifiedtype of circuit board) from user interface equipment 1530. Computer 1510may also provide information to the user at user interface equipment1530 with respect to results obtained from testing a circuit boardinterface with platform 1540 according to embodiments of the invention.Database 1514 may store information such as, for example, configurationsettings to be used for selected circuit boards.

User interface equipment 1530 enables a user to input commands tocomputer 1530 via input device 1532. Input device 1532 may be anysuitable device such as a conventional keyboard, a wireless keyboard, amouse, a touch pad, a trackball, a voice activated console, or anycombination of such devices. Input device 1532 may, for example, enablea user to enter commands to test a circuit board. A user may view thetest results on display device 1534. Display device 1534 may be acomputer monitor, a television, a flat panel display, a liquid crystaldisplay, a cathode-ray tube (CRT), or any other suitable display device.

Communication paths 1590 may be any suitable communications path such asa cable link, a hard-wired link, a fiber-optic link, an infrared link, aribbon-wire link, a blue-tooth link, an analog communications link, adigital communications link, or any combination of such links.Communications paths 1590 are configured to enable data transfer betweencomputer 1510, user interface equipment 1530, and platform 1540.

It will also be understood that various directional and orientationalterms such as “vertical” and “horizontal,” “left” and “right,” “top” and“bottom,” “edge,” “height,” and the like are used herein only forconvenience, and that no fixed or absolute directional or orientationallimitations are intended by the use of these words. For example, thedevices of this invention can have any desired orientation. Ifreoriented, different directional or orientational terms may need to beused in their description, but that will not alter their fundamentalnature as within the scope and spirit of this invention.

Thus it is seen that circuit boards with removable test point portionsand configurable testing platforms are provided. Those skilled in theart will appreciate that the invention can be practiced by other thanthe described embodiments, which are presented for purposes ofillustration rather than of limitation, and the invention is limitedonly by the claims which follow.

1. A circuit board, comprising: at least one functional portion; and at least one removable test point portion attached to the at least one functional portion, the removable test point portion comprising at least one test point electrically coupled to at least one test site located on the functional portion.
 2. The circuit board of claim 1, further comprising: electronic components installed on the functional portion, wherein the at least one test site comprises a location where an electronic component is electrical coupled to the functional portion.
 3. The circuit board of claim 1, further comprising: a plurality of signal conducting pathways disposed on at least one layer of the circuit board, wherein at least one the signal conducting pathways extends from the functional portion to the removable portion.
 4. The circuit board of claim 1, further comprising at least one cleavable portion on a first surface of the circuit board located between the functional and removable portions.
 5. The circuit board of claim 1, wherein the test point a bottom, top, or side mounted test point.
 6. A method for using a circuit board comprising at least one functional portion and at least one removable portion, the removable portion comprising at least one test point electrically coupled to at least one test site located on the functional portion, the method comprising: interfacing a test probe with the at least one test point; testing the test site with the test probe; and removing the removable portion from the circuit board.
 7. The method of claim 6, further comprising: prior to the testing, installing electrical components on the circuit board.
 8. The method of claim 6, further comprising: after the removable portion has been removed, using the functional portion for an end-use purpose.
 9. The method of claim 6, wherein the removing comprises exposing at least one lead, the method further comprising: treating the exposed lead.
 10. A circuit board, comprising: a plurality of functional portions; and a shared removable test point portion attached to at least two of the functional portions, the shared removable test point portion comprising a plurality of test points, wherein a first portion of the test points are electrically coupled to a first of the at least two attached functional portions and wherein a second portion of the test points are electrically coupled to a second of the at least two attached functional portions.
 11. The circuit board of claim 10, further comprising: a plurality of signal conducting pathways disposed on at least one layer of the circuit board, wherein at least one the signal conducting pathways extends from one of the functional portions to the shared removable portion.
 12. The circuit board of claim 10, wherein the test points are top or bottom mounted test points.
 13. The circuit board of claim 10, further comprising: a non-shared removable test point portion comprising at least one test point electrically coupled to one of the functional portions.
 14. The circuit board of claim 10, wherein the shared removable portion forms an interconnecting bridge network for connecting the functional portions together during manufacturing and testing.
 15. The circuit board of claim 10, wherein the shared removable portion comprises a third portion of test points electrically coupled to both the first and second attached functional portions.
 16. A testing system operable to test a plurality of circuit boards of different size and end-use purpose and each including side mounted test points, the system comprising: a testing platform operable to receive and test any one of the plurality of circuit boards, the testing platform comprising: first and second members for securing the received circuit board in place, wherein at least one of the members is movable such that the platform can receive circuit boards of different size, and wherein at least one the first and second members comprises a test probe array comprising a plurality of test probes for interfacing with side mounted test points of the received circuit board.
 17. The system of claim 16, wherein the first member is fixed and wherein the second member is movable, the second member coupled to a tension member that exerts a force on the second member to assist in securing the received circuit board.
 18. The system of claim 16, wherein the first and second members are movable in a linear direction.
 19. The system of claim 18, wherein the first and second members are movable in a rotatable direction.
 20. The system of claim 16, wherein the first and second members each comprise a test probe array comprising a plurality of test probes for interfacing with side mounted test points of the received circuit board.
 21. The system of claim 16, further comprising: a control system electrically coupled to at least the test probe array and operative to apply test signals to the test probes to test the received circuit board.
 22. The system of claim 16, the testing platform further comprising: test probe signal selection circuitry operative to electrically configure the test probes of the test probe array.
 23. The system of claim 22, further comprising: a control system electrically coupled to the test probe signal selection circuitry.
 24. A method for configuring a testing platform operative to receive and test a plurality of circuit boards of different size and end-use purpose, the method comprising: receiving an indication of a type of circuit board to be received by the testing platform; and electrically configuring the testing platform based on the received indication.
 25. The method of claim 24, wherein electrically configuring comprises selectively electrically coupling a test probe to one of a plurality of source data lines.
 26. The method of claim 24, wherein the testing platform comprises at least one test probe array comprising test probes for interfacing with side mounted test points of the circuit board, the electrically configuring comprises configuring the test probes based on the received indication.
 27. The method of claim 24, further comprising: testing the circuit board. 